PDF malware analysis — malicious · bf4f5f661602b1c9

MALICIOUS

PDF

86.0 KB Created: 2021-09-09 05:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 0e702fc438563d088fa03fd62b603b8e SHA-1: 2041e75e19f8e2c842d8681c8785b97a0600243a SHA-256: bf4f5f661602b1c943c2fb779af359fc6d6de5035715db1b01d8746d62918ff6

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, which are often used for phishing or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9930

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://mrspk.com/ckfinder/userfiles/files/jipefo.pdf In PDF document text
- https://nodka.eu/ckeditor/ckfinder/userfiles/files/pizegiwidevutavosu.pdfIn PDF document text
- https://weborder.cloud/userfiles/file///rewere.pdfIn PDF document text
- https://anandalaya.in/resources/file/jejefuviduwom.pdfIn PDF document text
- https://www.weboonline.com/ckfinder/userfiles/files/mizov.pdfIn PDF document text
- https://getracemirates.com/userfiles/files/dowisupunorimukoxutot.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313ee6214c6---97490082782.pdfIn PDF document text
- https://mailing.crpm.ch/ck/ckfinder/userfiles/files/fujivugesi.pdfIn PDF document text
- http://volareinmongolfiera.it/userfiles/files/rojetug.pdfIn PDF document text
- https://apaman.ti-am.jp/js/ckfinder/userfiles/files/vizupederixageragezawil.pdfIn PDF document text
- http://lianbang123.com/uploads/files/202109070410181520.pdfIn PDF document text
- http://gjbbang.com/userData/board/file/71512043850.pdfIn PDF document text
- http://yokohama-model.com/userfiles/files/jagifimoleno.pdfIn PDF document text
- https://3rproject.eu/ckfinder/userfiles/files/39658760761.pdfIn PDF document text
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/7ac32a646ed9f61b19afe1b85bb80078/semusowobokipiron.pdfIn PDF document text
- http://naviway.su/upload/files/72712857135.pdfIn PDF document text
- http://chataphan.com/file_media/file_image/file/36112759078.pdfIn PDF document text
- https://dallaslandscapedesign.com/media/files/12910139525.pdfIn PDF document text
- https://www.potravinyav21.cz/ckfinder/userfiles/files/51161375799.pdfIn PDF document text
- http://dellalontra.it/userfiles/files/jotejoko.pdfIn PDF document text
- https://artistaone.co/userfiles/files/rixelufoso.pdfIn PDF document text
- http://suamanhinhlcd.net/userfiles/file/rodutalasogono.pdfIn PDF document text
- http://gddfboiler.com/uploads/files/lamaxomiwut.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=professional+cuda+c+programming+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e1e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1E6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f9fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9FD	10968 bytes
SHA-256: `b1e5a245b22c03151e068486f4223af55539639f72037f4e6820fffcffa2107a`
`font_02_sfnt_off00011329.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11329	17532 bytes
SHA-256: `630e91d70ed8aabe66e9407a7aafe85f2dc9c3ab16b3e36f2454a5d4549ef426`
`font_03_sfnt_off00014135.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14135	1860 bytes
SHA-256: `562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560`

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